John Kerry

Denis Balibouse, pool / European Pressphoto Agency

Jean-Luc Chopard, right, Geneva head of protocol, welcomes U.S. Secretary of State John F. Kerry at his arrival at Geneva International Airport in Switzerland on Friday for talks between six world powers and Iran.

Jean-Luc Chopard, right, Geneva head of protocol, welcomes U.S. Secretary of State John F. Kerry at his arrival at Geneva International Airport in Switzerland on Friday for talks between six world powers and Iran. (Denis Balibouse, pool / European Pressphoto Agency)

Jean-Luc Chopard, right, Geneva head of protocol, welcomes U.S. Secretary of State John F. Kerry at his arrival at Geneva International Airport in Switzerland on Friday for talks between six world powers and Iran.